I will likely drop into AI soon, too, to play with/against my son.
With roughly 10k of Epic Orks (before Gargants) one army is set. With the size differences I will have to replace my Epic fighterbommers for AI/FW stuff, and will likely go for the suggested force and some Bommas (they simply look too good to pass).
What would be an appropriate opponent for Orks? Are there any matches that should be avoided (like Necrons vs. Guard in 40k), or do they all play fun and well? I am leaning towards Guard to start with, but honestly I am suficiently in love with the 40k background that I will play any race, and would like to choose that which offers the most fun if pitched against Orks.
I would like to draw from your experiences here...